WANG Lingling,CAO Yingui,WANG Fan,et al.Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa[J].Research of Soil and Water Conservation,2021,28(06):105-114.
生物炭对重构土壤化学性质及苜蓿抗旱性的影响
- Title:
- Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa
- 文章编号:
- 1005-3409(2021)06-0105-10
- Keywords:
- land reclamation; soil reconstruction; soil chemical properties; biochar; drought resistance
- 分类号:
- S158; S541
- 文献标志码:
- A
- 摘要:
- 为提升草原露天矿区干旱胁迫下生态修复效果，将内蒙古国家能源集团北电胜利露天煤矿矿区的表土、煤矸石、岩土剥离物及粉煤灰等原材料，按照不同配比构造4种不同的重构土壤组和表土对照组，以不同热解温度及不同用量的生物炭作为土壤改良剂，采用单因素方差分析法，开展了生物炭对土壤化学性质及苜蓿抗旱性的影响研究。结果表明:(1)施用不同处理方式的生物炭对表土对照组和重构土壤组土壤化学性质的改良效果不同。D1方案中，D1-500-12对土壤改良效果最优; H3方案中，H3-500-6对土壤改良效果最优; H10方案中，H10-300-24对土壤改良效果最优; H11方案中，H11-500-24对土壤改良效果最优; H15方案中，H15-400-6对土壤改良效果最优。(2)在重构土壤组H3，H10和H11中，当生物炭热解温度为300℃或400℃，且添加的生物炭含量为24 g时，干旱胁迫下苜蓿存活率均得到了显著的改善，在整个盆栽试验中，H3-400-24在干旱胁迫下苜蓿存活率最高。(3)结合不同处理方式的生物炭施用对土壤化学性质和苜蓿抗旱性的综合影响，最优的生物炭处理方式为H10-300-24。不同处理方式的生物炭施用对土壤化学性质的改善效果不同，对干旱胁迫下植物抗旱性的提升作用也不同。
- Abstract:
- The purpose of this study was to improve the effect of ecological restoration under drought stress in the grassland open-pit mining area. The topsoil，coal gangue，rock and soil stripping and fly ash from the Shengli open-pit mine area were constructed to reconstruct soil according to different proportions. Biochar with different pyrolysis temperatures was used as soil improver，and the variance analysis method was used to carry out the study on the effect of biochar on soil chemical properties and drought resistance of alfalfa. The results showed that:(1)application of biochar with different treatments had different effects on soil chemical properties in different schemes; in the D1 scheme，D1-500-12 had the best effect on soil improvement; in the H3 scheme，H3-500-6 had the best effect on soil improvement; in the H10 scheme，H10-300-24 had the best effect on soil improvement; in the H11 scheme，H11-500-24 had the best effect on soil improvement; in the H15 scheme，H15-400-6 had the best effect on soil improvement;(2)in the reconstructed soil group H3，H10 and H11，the survival rate of alfalfa under drought stress was significantly improved when the biochar pyrolysis temperature was 300℃ or 400℃ and the application amount was 24 g; in the pot experiment，H3-400-24 had the highest survival rate of alfalfa under drought stress;(3)with respect to the comprehensive effects of biochar applied in different treatment methods on soil chemical properties and drought resistance of alfalfa，the optimal biochar treatment method was H10-300-24. Application of biochar with different treatments has different effects on the improvement of soil chemical properties，and also has different effects on the improvement of plant drought resistance under drought stress.
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备注/Memo
收稿日期:2020-11-21 修回日期:2020-12-23资助项目:国家重点研发计划项目“表土稀缺矿区土壤构建与改良技术”(2016YFC0501105～2)第一作者:王玲玲(1998—)，女，河北邢台人，硕士研究生，研究方向为土地复垦与生态修复。E-mail:wll_1209@163.com通信作者:曹银贵(1982—)，男，湖南常德人，博士，教授，博士生导师.主要从事国土空间修复与土地利用管理研究。E-mail:caoyingui1982@126.com